A year ago I would have said I couldn't see 3DS topping 80-90 million lifetime by the end, but I can honestly say I could see it cresting 100 mil when all said and done, assuming Nintendo is able to pump out the software that is necessary to keep the system selling well throughout the next three years. Keeping the momentum is vital, moreso than ever nowadays, with all the heavy competition from tablet and smartphone games, as well as the Vita.
I think at this point, it's safe to say 3DS will easily match or exceed total GBA install base by the end of it's lifespan. We'll pass 45 million before the end of the year, less than three years into the system's lifecycle, and at that point 3DS is already halfway to reaching total GBA sales. 3DS will easily have another year or two of peak sales before things drop off, and by then we'll be talking about sales in the range of 70-80 million or more. Whether or not 3DS passes GBA or merely matches it... that really depends on when Nintendo decides to release a successor and drop software support for it. I'm betting Nintendo doesn't release a 3DS successor until holiday 2016, or early 2017.
The Screamapillar is easily identified by its constant screaming—it even screams in its sleep. The Screamapillar is the favorite food of everything, is sexually attracted to fire, and needs constant reassurance or it will die.
